V-type motor



T. w. FjHECH. V-TYPE MOTOR.

APPLICATION FILED DEC. 18, I918.

' 1,348,859. Patented Aug. 10, 1920.

fimjmy/ew pazgm UNITED STATES PATENT OFFICE.

THEODORE W. FRECH, 0F CLEVELAND, OHIO, ASSIGNOR TO THE PEERLESS MOTOR GAR COMPANY, OF CLEVELAND, OHIO, A. CORPORATION OF OHIO.

V-TYPE MOTOR.

Specification of Letters Patent.

Patented Aug. 10, 1920.

Application filed December 18, 1918. Serial No. 267,249.

To all whom it may concern:

Be it known that I, THEODORE W. FRnoH, a citizen of the United States, residing at Cleveland, in the county of Ouyahoga and State of Ohio, have invented a certain new and useful Improvement in V-Type Motors, of which the following is a full, clear, and exact description.

There is a noticeable and objectionable vibration of the steering wheels and columns on automobiles equipped with V-type motors, as ordinarily constructed, particularly eight cylinder motors wherein the four cylinders in one row are set at right angles to the four cylinders of the other row.

This steering wheel vibration is believed to be due to certain approximately hori zontal vibration produced in the motor by the shifting of the centers of gravity of the moving parts, particularly the pistons.

The object of this invention is to so greatly reduce the above mentioned vibration that its effects become unimportant.

The invention consists in making the moving parts, preferably the pistons, associated with the cylinders, in one row, or, in shop parlance, one leg of the V, lighter than those associated with the cylinders of the other row or leg.

The drawing is a sectional end elevation of a V-type internal combustion motor in which the present invention is embodied,- the cylinders of one row or leg having their axes in a plane at right angles to the plane which contains the axes of the cylinders in the other leg.

Referring to the parts by reference characters, 10 represents the cylinders in one row or leg of the motor V; and 10 the cylinders in the other row or leg thereof. 12 and 12 represent respectively the pistons associated with the cylinders in the two legs of the V, 14L and 14? the connecting rods, and 15 the crank shaft.

In carrying out'the invention most effectively, from a practical standpoint, the

pistons 12 in the cylinders of a leg of the the right leg, but obviously the same result would be attained if they were made lighter.

It is also believed that similar results, although perhaps not in the same degree, would be attained if the connecting rods associated with the cylinders of one leg of the V were made lighter than those associated with the cylinders of the other leg. Or the desired difference in the Weight of the moving parts associated with the cylinders to the two legs of the V might be brought about by varying the weights of both the pistons and the connecting rods associated with the two legs of the V. As stated, however, satisfactory results have been attained by merely making pistons associated with one leg of the V about 10% heavier than those associated with the other leg of the V, without making any other change in the ordinary construction.

Having described my invention, I claim l. A method of minimizing certain vibrations in an internal combustion engine of the V-type having two rows of cylinders of the same diameter whereof the cylinders of one row are set at 90 to the cylinders of the other row, which consists in making the moving parts associated with each cylinder in one row heavier than the moving parts associated with the opposed cylinder in the other row.

2. The method of minimizing certain vibrations inan internal combustion engine of the V-type having two rows of cylinders of the same diameter, which consists in making the pistons associated with the several cylinders of one row heavier than the pistons associated with the cylinders of the other row.

3. A plural cylinder internal combustion engine of the V-type having two rows of cylinders all of the same diameter, and having the moving parts associated with the cylinders in one row heavier than the corresponding moving parts associated with the cylinders in the other row.

4. A plural cylinder internal combustion engine of the V-type having two rows of cylinders all of the same diameter and having the pistons associated with the cylinders of one row heavier than the corresponding pistons associated with the cylinders of the other row.

In testimony whereof, I hereunto affix my signature.

THEODORE W. FRECI-I. 

